Typewriting machine



July 15, 1924. 1,501,562

A. G. F. KUROWSKI TYPEWHITING MACHINE Filed Aug. 23 1919 Patented Judy E5, 1924.

units stares I ate-tea ent ant are;

ALLFRED G. F. KUROWSKI, OF BROOKLYN, NEW Y0, ASSIGNGR T U NDWQO'D TYPEWRITER COMPANY, OF NEW Y0, N. Y., A CORPORATION OF DW TYYEWRITING- MACHINE.

J Application filed August 23, 1919. Serial No. $18,459:).

T 0 all whom it may concern:

Be it known that I, ALFRED G. F. KURow- SKI, a citizen of the United States, formerly a citizen of Germany, residing in Brooklyn Borough, in the county of Kings, city and State of New York, have invented certain new and useful Improvements in Typewriting Machines, of which the following'is a specification.

This invention relates to the type-keys of typewriting machines. Such keys include a paper on which is printed the designation of the type or types controlled by the particular key, and a glass cover serving to to protect the paper. In some instances it may be desirable to change the type papers so as to substitute others bearing difi'erent char acters, or to substitute blanks. This invention, therefore, has for an object such imso provement in the construction of a type-key that the key-paper thereof may be changedv by an operative who is unskilled in mechanics by an extremely simple manipulation.

A feature of the invention consists in the provision of a key-cup of usual construction surmounted by a key-ring which loosely engages the cup, and which is detachably secured thereto. Preferably the securing means consists of a spring clip or looking member, under the cup, and provided with portions which resiliently seat into a groove formed in the flange of the ring, which projects downwardly below the bottom of the cup, the clip having other portions engaging the under side of the key-cup to pre vent the ring from being lifted 0d the cup when the clip is in place. Finger-pieces depend, under the cup, from the clip to enable to it to be sprung to release its locking portions from the ring groove so that the ring may be readily lifted from the cup.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a perspective view of the invention.

Figure 2 is a perspective view of the parts constltuting my improved key-top, said to parts being separated to better show their manner of co-operation. Figure 3 is a sectional view. Figure d is a bottom plan view. Figure 5 is a perspective detail 0% the spring clip or locking member.

Referring to the drawings, a key-stem 1 has mounted upon it the usual key-cup 2, said cup having the usual rectangular shank forming a socket which tightly fits over the upper portlon of the key-stem, said cup also having the usual under side or bottom, as shown in the drawings, and the usual flange 3 forming the cup, and within said flange are held the key-paper 4s and the glass protecting cover 5.

A key-ring 6 surmounts the key-cup, this ring having a turned-over top flange 7 and a side flange 8. The inturned top flange 7 1s turned downward at its edge for securely and firmly retaining the usual key-paper and glass cover. The side flange 8 is provided in its lower margin with an inner annular or circumferential groove 9 preferably formed by striking out the sides of the metal forming the ring, said groove occupying a position substantially in the plane of the under side of the key-cup, by reason of the flange or skirt 8 of the key-ring projecting downwardly below the bottom of the cup. In order to detachably secure the rin to the cup, there is provided a manually-relbasable spring clip or looking member 10, shown in the drawings as a resiliently expansible Wire split-ring, forming an expansible catch-device under the cup. This member is formed as shown in Figures 4 and 5, and is provided with outwardly-projecting locking portions 11 which seat into the groove 9 of the keyring, said clip also being provided between the projections 11 with inner portions 12 free of said groove and which engage the under side or bottom of the cup, so that when the spring clip or looking member is in normal position it presents the a pearance shown in Figure 4.. This spring cTip is also provided at its ends with a pair of de ending spaced fingers 13, Which project ownwardly under the cup, and by which the clip is manipulated when it is desired to remove the ring from the cup, by squeezing together the finger-pieces 13 for contracting the catch-device to disengage or withdraw the locking projections 11 from the groove 9. It will be readily understood, of course, that, as soon as the locking portions 11 are disengaged from the groove, the ring may be lifted 0d the cup and the key-paper changed or entirely removed, as deemed;

With the construction described, no tool is necessary to remove the key-ring, and no are,

. mechanical skill is necessary in performing the operation. ,g

Variations may be resorted to within the scope of the mvention, and portions of the im rovements may housed without others.

thus described my invention, I

, and an upstanding mar inal flange, a keypaper *lbosely ='cont'aine in the cup and overlying the bottom thereof, a. cover-' .g'lassloosely'contained in the on and restmg on the key-paper, a ring having a skirt enable the ring removably fitting over the marginal flange changing the ey -paper.

of the cup from the top and provided at .its top 'wlth an inturned flange'to engage the marginof the cover-glass hold t e cover-glass and the key-paper in the cup,

said skirt having a lower marginal portion menace projecting downwardly below the bottom of the cup and provided with an internal annular groove, a spring-wire expansible catchdevice under the cup and having projections to engage in said groove and having ortions between said PIOJBGblOIlS free of em groove and engaging the bottom of the cup, so as to retain the ring on the cup, and a pair of spaced finger-pieces carried by thevcatchdevice and projecting therefrom downwardly under the cup to be s ueezed together for contracting the catchevice to disengage said projections. from said groove, to to be lifted 011' the cup for ALFRED e. F. KU'ROWSKI.

Witnesses Fnno A. 1 Gnose, Earn; 3. Lmm. 

